The mathematicalnotation for taking the floor of x is to surround it by
vertical bars, like the absolute value notation, except with short horizontal stems
joined to the bottom of the bars and pointing inwards (like [x] with the
top stems missing). The HTMLtags are &lfloor; and &rfloor; and on your browser
they look like this:
⌊x⌋.

That part of the bottom of a vessel on each side of the keelson which is most nearly horizontal.

7. Mining (a)

The rock underlying a stratified or nearly horizontal deposit.

(b)

A horizontal, flat ore body.

Raymond.

Floor cloth, a heavy fabric, painted, varnished, or saturated, with waterproof material, for covering floors; oilcloth. -- Floor cramp, an implement for tightening the seams of floor boards before nailing them in position. -- Floor light, a frame with glass panes in a floor. -- Floor plan. (a) Shipbuilding A longitudinal section, showing a ship as divided at the water line. (b) Arch. A horizontal section, showing the thickness of the walls and partitions, arrangement of passages, apartments, and openings at the level of any floor of a house.